Display Panel Integrating A Driving Circuit

ABSTRACT

A display panel includes a periphery area, an active display area adjacent to the periphery, a driving chip disposed out of the active display area for driving the active display area, and a plurality of wires electrically connecting the driving chip and the active display area. The width of at least one wire at a portion adjacent to the driving chip is smaller than the width of the at least one wire at the other portion adjacent to the active display area.

BACKGROUND

1. Technical Field

The present disclosure generally relates to a display apparatus, andparticularly to a display apparatus including a display panel whichintegrates a driving circuit therein,

2. Description of Related Art

Referring to FIG. 1 and FIG. 2, a display panel 10 includes an activedisplay area 12 and a periphery area 18 adjacent to the active displayarea 12, A driving chip 14 is disposed in the periphery area for drivingelectrical elements (not shown) in the active display area 12. A layoutarea 16 is also defined at the periphery area 18 and between the drivingchip 14 and the active display area 12. A plurality of electrical wires162 in the layout area 16 electrically connect the driving chip 14 andthe electrical elements in the active display area 12. Each of the wires162 has a same width. The layout area 16 may have an approximatelytrapezoid shape. The layout area 16 may be divided into a plurality ofparts along a direction parallel to a boundary 19 between the displayarea 12 and the periphery area 18. The plurality of parts may include acenter part 16 a and two side parts 16 b at opposite sides of the centerpart 16 a.

However, due to the length of a side of the driving chip 14 where thewires 162 extend from being much shorter than that of the boundary 19 ofthe active display area 12 where the signal pins are disposed, thelengths of the wires 162 located in the center part 16 a are shorterthan that of the wires 162 located in the two side parts 16 b. That is,the lengths of the wires 162 which are far away from the center part 16a of the layout area 16 are much longer than that of the wires 162 inthe center part 16 a of the layout area 16. Because the lengths of thewires 162 are different, impedances of the wires 162 are accordinglydifferent. For example, the minimum impedance value of the wire 162 inthe most center part 16 a may be 0.1Ω, and the maximum impedance valueof the wires 162 in the two farthest sides of the two side parts 16 bmay be 2053.2Ω. Thus the difference of the impedance values can be2053.1Ω. When the size of the display panel 10 increases, the maximumdifference between the impedance values of the wires 162 increases.Therefore, distortion grades of signals according to the impedances ofthe wires 162 are different from each other after the signals aretransferred via the wires 162, and the display quality of the displaypanel 10 may be seriously deteriorated.

What is needed, therefore, is a display panel thereof which can overcomethe described limitations.

SUMMARY

A display panel includes a periphery area, an active display areaadjacent to the periphery area and having two opposite sides connectingwith the periphery area, a driving chip disposed at the periphery areafor driving electrical elements in the active display area, and aplurality of wires electrically connecting the driving chip and theelectrical elements in the active display area. The distance from afirst part of the wires to the center of the driving chip is fartherthan the distance from a second part of the wires to the center of thedriving chip, and the width of the first part of the wires on areference line perpendicular to the opposite sides of the active displayarea is greater than the width of the second part of the wires on thereference line.

Other novel features and advantages will become more apparent from thefollowing detailed description when taken in conjunction with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The components in the drawings are not necessarily drawn to scale, theemphasis instead being placed upon clearly illustrating the principlesof the present disclosure. Moreover, in the drawings, like referencenumerals designate corresponding parts throughout the several views, andall the views are schematic.

FIG. 1 is a schematic diagram of a typical display panel including alayout area.

FIG. 2 is an enlarged, schematic diagram of part of the layout area inthe display panel of FIG. 1.

FIG. 3 is a schematic diagram of a display panel according to anembodiment of the present disclosure, the display panel including alayout area.

FIG. 4 is an enlarged, schematic diagram of part of the layout area inthe display panel of FIG. 3.

FIG. 5 is a schematic diagram of a display panel according to anotherembodiment of the present disclosure, the display panel including alayout area.

DETAILED DESCRIPTION

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings. In the following detaileddescription, numerous specific details are set forth in order to providea thorough understanding of the present disclosure. However, it will beapparent to one of ordinary skill in the art that the present disclosuremay be practiced without these specific details. In other instances,well-known components, and circuits have not been described in detail soas not to unnecessarily obscure aspects of the embodiments.

Referring to FIG. 3 and FIG. 4, a display panel 100 according to anembodiment of the present disclosure includes an active display area 120for display and a periphery area 180 adjacent to the active display area120. The active display area 120 has two opposite sides 121 connectingwith the periphery area 180. A driving chip 140 is disposed in theperiphery area 180 for driving electrical elements (not shown) in theactive display area 120. A layout area 160 is also defined in theperiphery area 180 and between the driving chip 140 and the activedisplay area 120. The layout area 160 may have an approximately arcshape design. A plurality of electrical wires 164 formed in the layoutarea 160 electrically connect the driving chip 140 and the electricalelements in the active display area 120. The layout area 160 may bedivided into a plurality of parts along a direction parallel to aboundary 190 between the active display area 120 and the periphery area180. The plurality of parts may include a center part 160 a and two sideparts 160 b at opposite sides of the center part 160 a.

Lengths of the wires 164 are different. Lengths of the wires 164gradually increase from a center of the center part 160 a to farthestedges of the side parts 160 b. The lengths of the wires 164 located inthe center part 160 a are shorter than that of the wires 164 located inthe two side parts 160 b. In the present disclosure, at least a part ofthe wires 164 has a various width. For example, the distance from afirst part of the wires 164 to the center of the driving chip 140 isfarther than the distance from a second part of the wires 164 to thecenter of the driving chip 140, and the widths of the first part of thewires 164 adjacent to the opposite sides 121 of the active display area120 and on a reference line 170 perpendicular to the opposite sides 121are longer than the widths of the other part of the wires 164 adjacentto a center of the driving chip 140 and on the reference line 170.Additionally, the width of at least a part of the wires 164 graduallyincrease from an end adjacent to the driving chip 140 to the other endadjacent to the active display area 120 and the wires 164 located in thecentre part 160 a have same width from the end adjacent to the drivingchip 140 to the other end adjacent to the active display area 120.Further, widths of the wires 164 are different at positions located atthe reference line 170 which is parallel to the boundary. Specifically,the width of each wire on the reference line 170 gradually increase fromthe center of the driving chip to the opposite sides of the activedisplay area. The length of the wire 164 is greater, the width of thewire 164 at the position is greater. For example, the widths of thewires 164 which are far away from the center part 160 a of the layoutarea 160 are much greater than the widths of the wires 164 located inthe center part 160 a of the layout area 160. The outermost wires 164located in the two side parts 160 b may have curve edges.

The width of at least a portion of the wires 164 gradually increase froman end adjacent to the driving chip 140 to the other end adjacent to theactive display area 120 and the width of the wires 164 on the referenceline 170 gradually increase from the center of the driving chip 140 tothe opposite sides 121 of the active display area 120. Therefore, themaximum impedance value of the wires 164 in the two farthest sides ofthe two side parts 160 b of the layout area 160 is reduced, and themaximum difference among the impedances of the wires 164 is alsoreduced. For example, the maximum impedance value of the wires 164 inthe two farthest sides of the two side parts 160 b of the layout area160 may be 991.4Ω, and the minimum impedance value of the wire 164located in the most center part 160 a of the layout area 160 may be7.5Ω, thus the difference of the impedance values can be 983.9Ω. Thatis, the difference of the impedance value between wires 164 located inthe two side parts 160 b of the layout area 160 and the impedance valueof wires 164 located in the center part 160 a of the layout area 160 canbe reduced.

In this embodiment of the present disclosure, the difference of theimpedance values between the wires 164 caused by different lengths ofthe wires can be reduced. The maximum difference between impedancevalues of the wires 164 is also significantly reduced. Therefore, thedistortion grades of signals according to the impedance of the wires 164are reduced, and the display quality of the display panel 100 may begreatly improved.

In another alternative embodiment of the present disclosure, referringto FIG. 5, a display panel 100′ is similar to the display panel 100, andthe differences are described as below. The layout area 160′ may have anapproximately rectangular shape. A plurality of wires is formed in thelayout area 160′. The area of the layout area 160′is larger than that ofthe layout area 160, and the widths of the wires in the layout area 160′is much greater than the widths of the wires of the layout area 160. Thewidth of each wire from a first end connecting with the driving chip toa second end connecting with the display area in the two side parts ismuch greater. Therefore, the difference of the impedance value of wireslocated in the two side parts of the layout area 160′ and the impedancevalue of wires located in the center part of the layout area 160′ canalso be reduced.

It is believed that the present embodiments and their advantages will beunderstood from the foregoing description, and it will be apparent thatvarious changes may be made thereto without departing from the spiritand scope of the embodiments or sacrificing all of their materialadvantages.

1. A display panel, comprising: a periphery area; an active display areaadjacent to the periphery; a driving chip disposed out of the activedisplay area for driving the active display area; and a plurality ofwires electrically connecting the driving chip and the active displayarea; wherein the width of at least one wire at a portion adjacent tothe driving chip is smaller than the width of the at least one wire atthe other portion adjacent to the active display area.
 2. The displaypanel of claim 1, wherein the active display area has two opposite sidesconnecting with the periphery area, wherein the distance from a firstpart of the wires to the center of the driving chip is farther than thedistance from a second part of the wires to the center of the drivingchip, and the width of the first part of the wires on a reference lineperpendicular to the opposite sides of the active display area isgreater than the width of the second part of the wires on the referenceline.
 3. The display panel of claim 1, wherein the width of some of thewires gradually increases from the portion adjacent to the driving chipto the other portion adjacent to the active display area.
 4. The displaypanel of claim 1, wherein the periphery area further comprises a layoutarea between the driving chip and the active display area, and the wiresare disposed in the layout area.
 5. The display panel of claim 4,wherein the layout area has an approximately arc shape design.
 6. Thedisplay panel of claim 4, wherein the layout area comprises a centerpart and two side parts at opposite sides of the center part.
 7. Thedisplay panel of claim 6, wherein the wires located in the two sideparts has curve edges.
 8. The display panel of claim 6, wherein theactive display area has two opposite sides connecting with the peripheryarea, wherein the distance from a first part of the wires to the centerof the driving chip is farther than the distance from a second part ofthe wires to the center of the driving chip, and the width of the firstpart of the wires on a reference line perpendicular to the oppositesides of the active display area is greater than the width of the secondpart of the wires on the reference line, and wherein the widths of thewires located in the two side part and on the reference line are greaterthan the widths of the wires located in the center parts and on thereference line.
 9. The display panel of claim 6, wherein the wireslocated in the centre part have same width from the portion adjacent tothe driving chip to the other portion adjacent to the active displayarea.
 10. The display panel of claim 4, wherein the layout area has anapproximately rectangular shape.